Sheet-folding mechanism



April 24, 1928.

H. M. BARBER SHEET FOLDING v MECHANISM Filed April 2, 3,927 2 Sheets-Sheet INVENTOR M m 7/ ATTORNEYS April 24, 1928. 1,667,370

H. M. BARBER SHEET FOLDING iwcuimsu Filed April 2, 1927 Z SheetS-Sheet 2 INVENTOR MZZM ATTORNEYS Patented Apr. 24, 1928.

HowAR'n M. BARBER, or rnwcnrnox, conmcmcmjxssmnos Too. is. corrnnLne soNs COMPANY, or

WESTERLY, RHQJDE ISLAND; CORPORATION or ELA ARE.

' "SHEET-FOLDING mnonnmsmj Application ined'np'ru 2, 1927. Serial No. 180501.

In sheet folding mechunisnr where coacting' floating folding jaws and'b-lzrdes are used 7 to inibert the fold tothe sheet or groupof sheetsit has been found that the stationary am which controls the opening and closing of the folding jaws wassomewhatinaccurate in the timeio'f closing the jaws, due to the fact that when the roller of the jaw opening and closing lever engaged the cam to open the jaws, it would becaused 1 to jump away from the can] and the exact point of its return to the camj surface on the jaw closing incline thereof was somewhrrtuncertain as well as causingja considerable student of noiseandalso undue wear on both the roller andthe cam, thereby making their coactionevenmore 'in'accurate'.

The'objee't of myinven'tion isto )rovidc an extensible and contractible cam for con.

trolling the opening and c'lo'sing ofthe floatingffold'ing ja-w's -the ca m part whieh controls the opening oft-he jaws being fixed and the cam artwhicli controls the closing of the jaws being adjustable longitudinally, concentric with thehxis of the folding: jaw carrier.

Apract-ical embodiment of my invention is represented in the ecconipai'iying drawings,'in which Fig. 1 represents a detail front view of the folding jaw carrier and its adjacent parts at one end thereof. 7

Fig. 2 represents a, cross sectiontaken in the plane of the line II- II of Fig. 1, looking in the direction of the arrows;

Fig. 3 represents a detail cross section taken in the plane of the line III-III of Fig. 1, looking in the direction of the arrows.

Fig. at represents a. detail section taken in the planes of the line IVIV of Fig.3, looking in the direction of the arrows.

Fig. 5 represents a detail view taken in V the plane of the line V'V of'Fig 3, look ing in the direction of the arrows.

The floating folding jaws of each pair are denoted by 1,2, which jaws are mounted to oscillate. in the usual manner in suitable bearing supportsS fixed to the rotarycarrier 4. The jaw floating control lever 5 1S provided'with the usual roller 6 arrangedto travel in the endless groove 7 of the sta nuts 20. 21.

tionary box cani8 for oscillating the jaws to float them position. t i I M v. To counteract the centrifugal force of the :jiltWSvtlS they arefloated' into and out of their folding position so that the rollersfi will beheldagainst the inner wall. of the cam: groove 7, I provide bell crank lever pivoted-at 9 on the rotary carrier 4 adjacent to its pair of folding jawsl1, 2. A pressure 7 spring '10 exerts itstension against one arm 11 0f the hell'crank lever,'theflother army12 of said lever having its outer end positioned to engage an abutment 13 on the foldingjaw 1 as the jaws arebein' g floated into an'd out o'f 'th eir folding position; The tension'of this spring 1 0i may be regulated to exert the required pressure on the abutment 13 of the folding jaw. 1 to holdthe roller '5 againstthe inner'wall ofits coin groove Tas the folding jaws are moved into and out oftheir folding position. 1 ,a The opening and closingfof the folding jagws as they are moved to; and from their folding position is controlled by the leverl4 projecting from the rock shaft 15' to which the folding jaw 2 is SQCIII'Gd,'SZli(1 lever being provided with a roller 16 arranged in position to be engaged by the extensible and contractible cam, the fixed and adjustable parts i of which are denoted by17, 18. A spring 19 exerts its tension on the lever 14 for yieldingly holding the lever at the limit of its inward movement and thereby the jaw 2 closed against the jaw 1. v v

The fixed part 17 of the cam 17, 18 is secured in itsproper. position on the box cum 8, in the present instance by the bolts and This part of the cam first en gages the roller 16 on the lever 14 for controllingthe opening of the come to their folding position; v

The other part 18 of the cam is adjustably secured to the box cam-8 by the bolts and nuts 22, 23, the bolts 22 passing through elongated slots 24. This adjustment of the cam part 18 is along a linewconcentric with the axis of the rotarycarrier 4. By' this arrangement the concentric surface of the cam maybe extended and contracted and the position of the inclined surface of the cam' which controls the closing of the jaws may jaws as they be properly positioned to control the closing of the jaws at the exact time onto the folded product.

It will also be seen that counterbalancing means for counteracting the centrifugal action of the jaws not only tends to hold the roller 6 of thejaw floating control lever at the limit of its inward movement but also tends to prevent the jumping of the roller 16 of the jaw opening and closing lever away from the surface of its extensible and contractible cam 17, 18, thereby materially lessening the noise and preventing undue wear of theparts aswell as ensuring accuracy in the closing of the jaws. I

It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts withoutdeparting from the spirit and scope of my invention; hence, I do not wish to be limited to the particular embodiment herein shown and described, but

lVhat I claim is I 1. In a folding mechanism, a rotary carrier, a pair of folding jaws carried thereby, and means for controlling the opening and closing of the jaws, said means including an extensible and contractible cam.

2; In a folding mechanism, a rotary carrier, a pair of floating folding jaws carried thereby, means for floating said jaws to and from their folding position, and means for controlling the opening and closing of the jaws, said means including an extensible and contractible cam.

3. In a folding mechanism, a rotary carrier,'a pair of folding jaws carried thereby, and means for controlling the opening and closing of the jaws, said means including an extensible and contractible cam having a fixed part for controlling the opening of the jaws and an adjustable part for controlling thevtirne of closing ofsaid, jaws.

4. In a folding mechanism, a rotary carrier, a pair of floating folding jaws carried thereby, means for floating said jaws to and from their folding position, and means for controlling the opening and closing of the jaws, said means including an extensible and contractible cam having a fixed part for controlling the opening of the jaws and an adjustable part for controlling the time of closing of saidjaws.

' 5. In a'fol'ding mechanism, a rotary carrier, a pair of folding jaws carried thereby. and means for controlling the opening and closing of the jaws, said means including an 1 extensible and contractible cam having a fixed part for controlling the opening of the jaws and another part adjustable along a line concentric with the axis of the carrier for controlling the time of closing of said 6. In a folding mechanism, a rotary carrier, a pair of floating folding jaws carried thereby, means for floating said jaws toand from their folding position, and means for cont-rolling the openingand closing ofv the jaws, said means including an extensible and contractible cam having a fixed part for controlling the opening of the jaws and another part adjustable along a line concentric with the axis of the carrier for controlling time of closing of said jaws.

In testimony, that I claimthe foregoing as my invention, I have signed my name this 30th day of March 1927. e

HOWARD M. BARBER.

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